difference in difference

  1. G

    significance of difference across genders between changes in two conditions

    I would like to find out whether measured biological changes in a disease condition compared to a healthy control condition differ significantly between the two genders. So instead of classical approaches for testing the significance of the difference between two conditions, I would need to...
  2. kiton

    Unusual distribution of the continuous outcome

    Hello dear forum members! I am seeking your guidance with the following issue. So, I am estimating a "classic" difference-in-difference model (using pooled OLS estimator): Y = time + treated + time*treated, where Y is the average Medicare payment (amp) in $. Here is the descriptive...
  3. V

    Diff in Diff -> what is the minimum amount of treated observations?

    Can I use Diff in Diff when I only have a single treated observation? The case is that I observe the changes of a tax reform on real estate sales on the real estate prices (measured by an index). If I used the Index as my dependent variable I do not fulfill the 3rd assumption of the OLS, as...
  4. E

    Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help here! I have performance data of companies which can be categorized into two different groups (state-owned, not state-owned). Now I would like to...